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Basic Computer MCQ for Competitive Exams for Students
Quick Quiz
Modern computers represent characters and numbers internally using which one of the following number systems?
(a) Penta
(b) Octal
(c) Heka
(d) Septa
(e) Binary
Option e – Binary
The decimal number system is a group of numbers including:
(a) 0 or 1
(b) 0 to 9
(c) 0 to 7
(d) 0 to 9 and A to F
Option b – 0 to 9
The binary system is also called:
(a) Base one system
(b) Base two system
(c) Base system
(d) Binary system
Option b – Base two system
The number system based on ‘0’ and ‘1’ only is known as:
(a) Binary system
(b) Barter system
(c) Number system
(d) Hexadecimal system
Option a – Binary system
To perform calculations on stored data, computers use which number system?
(a) Decimal
(b) Hexadecimal
(c) Octal
(d) Binary
Option d – Binary
How many types of number systems are there?
(a) One
(b) Two
(c) Three
(d) Four
Option d – Four
Which of the following is an example of a binary number?
(a) 6AH1
(b) 100101
(c) 005
(d) ABCD
(e) 23456
Option b – 100101
Conversion of binary number (1001001)₂ to hexadecimal is:
(a) (40)₁₆
(b) (39)₁₆
(c) (49)₁₆
(d) (42)₁₆
(e) None of these
Option c – (49)₁₆
Conversion of binary number (101110)₂ to hexadecimal is:
(a) (35)₁₆
(b) (46)₁₆
(c) (2E)₁₆
(d) (50)₁₆
(e) None of these
Option c – (2E)₁₆
The most widely used code that represents each character as a unique 8-bit code is:
(a) ASCII
(b) UNICode
(c) BCD
(d) EBCDIC
(e) None of these
Option a – ASCII
A collection of related files is called a:
(a) Character
(b) Field
(c) Database
(d) Record
(e) None of these
Option d – Record
______ is a primary key of one file that also appears in another file.
(a) Physical key
(b) Primary key
(c) Foreign key
(d) Logical key
(e) None of the above
Option c – Foreign key
______ is an invalid type of database key.
(a) Structured primary key
(b) Atomic primary key
(c) Primary key
(d) Composite primary key
(e) None of these
Option a – Structured primary key
Oracle is a(n):
(a) Hardware
(b) High-level language
(c) Operating system
(d) System software
(e) RDBMS
Option e – RDBMS
The purpose of the primary key in a database is to:
(a) Unlock the database
(b) Provide a map of the data
(c) Uniquely identify a record
(d) Establish constraints on database operations
(e) None of these
Option c – Uniquely identify a record
What is a stored question about information in a database?
(a) Query
(b) Sort
(c) Report
(d) Record
(e) Field
Option a – Query
Data duplication wastes space but also promotes a more serious problem called:
(a) Isolated
(b) Data inconsistency
(c) Other than those given as options
(d) Program dependency
(e) Separated data
Option b – Data inconsistency
A ______ is a collection of data that is stored electronically as a series of records in a table.
(a) Spreadsheet
(b) Presentation
(c) Database
(d) Webpage
Option c – Database
Items such as names and addresses are considered as:
(a) Input
(b) Data
(c) Output
(d) Records
Option b – Data
Which type of database organizes the data in the form of a tree with nodes?
(a) Network Database
(b) Hierarchical Database
(c) Relational Database
(d) Multiple Database
Option b – Hierarchical Database
The smallest unit of information about a record in a database is called a:
(a) Cell
(b) Field
(c) Record
(d) Query
Option b – Field
Rows of a relation are called:
(a) Relation
(b) Tuples
(c) Data structure
(d) An entity
Option b – Tuples
The cardinality property of a relation refers to the:
(a) Number of databases
(b) Number of columns
(c) Number of rows
(d) Number of tables
Option c – Number of rows
DBMS is comprised of tables that are made up of rows called ______ and columns called ______.
(a) Fields, records
(b) Records, fields
(c) Address, fields
(d) Ranges, sheet
(e) Records, ranges
Option b – Records, fields
Which of the following is not a binary number?
(a) 001
(b) 101
(c) 202
(d) 110
(e) 011
Option c – 202
Second-generation languages are languages that consist of:
(a) Machine Language
(b) Assembly Language
(c) Java
(d) Visual Basic
Option b – Assembly Language
Which of the following generation languages consist of statements similar to the statements of human language?
(a) 1GL
(b) 2GL
(c) 3GL
(d) 4GL
Option d – 4GL
Error in a program is called:
(a) Bug
(b) Debug
(c) Virus
(d) Noise
Option a – Bug
Error that occurs when a program tries to read from a file without opening it is classified as:
(a) Execution error messages
(b) Built-in messages
(c) User-defined messages
(d) Half messages
(e) None of the above
Option a – Execution error messages
Selection of source language is a factor in the:
(a) Programmer skill
(b) Language availability
(c) Program compatibility with other software
(d) All of the above
Option c – Program compatibility with other software
The use of a combination of I’s and O’s is a feature of which of the following types of computer language?
(a) High-level language
(b) PASCAL
(c) Machine Language
(d) C
(e) COBOL
Option c – Machine Language
Languages that can easily interact with the hardware are called:
(a) High-level languages
(b) Low-level languages
(c) Middle-level languages
(d) All of the above
Option b – Low-level languages
All computers execute:
(a) BASIC Programs
(b) COBOL Programs
(c) Machine language Programs
(d) FORTRAN Programs
Option c – Machine language Programs
Each model of a computer has a unique:
(a) Assembly of a computer
(b) Machine language
(c) High-level language
(d) All of the above
Option b – Machine language
Computer language used for calculation is:
(a) Logo
(b) Fortran
(c) Basic
(d) C++
Option b – Fortran
LISP is designed for:
(a) Artificial Intelligence
(b) GUI
(c) CUI
(d) Optical fiber
Option a – Artificial Intelligence
Computer language used on the Internet is:
(a) PASCAL
(b) JAVA
(c) BASIC
(d) Logo
Option b – JAVA
The language used for the development of various games is:
(a) C
(b) C++
(c) Java
(d) SQL
Option c – JAVA
C++ language was developed by:
(a) Dennis Ritchie
(b) Charles Babbage
(c) Niklaus Wirth
(d) Bjarne Stroustrup
(e) John McCarthy
Option d – Bjarne Stroustrup
Compiler is the name given to the computer:
(a) Part of the digital machine to store information
(b) Operator of Boolean algebra
(c) Translator of source program to object code
(d) None of the above
Option c – Translator of source program to object code
An assembler is:
(a) Programming language dependent
(b) Syntax dependent
(c) Machine dependent
(d) Data dependent
Option a – Programming language dependent
Which of the following computer languages is a mathematically oriented language used for scientific problems?
(a) Fortran
(b) COBOL
(c) LISP
(d) Prolog
Option a – Fortran
______ is a string-oriented language.
(a) SNOBOL
(b) COBOL
(c) PASCAL
(d) PERL
Option b – COBOL
A computer program used for business applications is:
(a) Logo
(b) COBOL
(c) BASIC
(d) Fortran
Option b – COBOL
Main application area of ALGOL is:
(a) General
(b) Scientific
(c) Engineering
(d) Commercial
Option b – Scientific
C language was developed by Dennis Ritchie in:
(a) 1970
(b) 1971
(c) 1972
(d) 1973
Option c – 1972
Which commands are automatically loaded into main memory?
(a) Internal
(b) External
(c) Viral
(d) Situational
(e) None of these
Option a – Internal
Which among the following is not a mobile operating system?
(a) Android
(b) Safari
(c) Symbian
(d) iOS
(e) BlackBerry
Option b – Safari
Linux is a type of software:
(a) Shareware
(b) Commercial
(c) Proprietary
(d) Open source
(e) Hidden type
Option d – Open source
Restarting a computer while it is already on is called:
(a) Cold booting
(b) Warm booting
(c) Shutdown
(d) Logging off
(e) None of these
Option b – Warm booting
A program in execution is called:
(a) Process
(b) Instruction
(c) Procedure
(d) Function
Option a – Process
Assembly language:
(a) Uses alphabetic codes in place of binary numbers used in machine language
(b) Is the easiest language to write programs
(c) Does not need to be translated into machine language
(d) All of the above
(e) None of these
Option a – Uses alphabetic codes in place of binary numbers used in machine language
An operating system is:
(a) Application software
(b) Accounting software
(c) System software
(d) Utility software
Option c – System software
A collection of programs that controls how your computer system runs and processes information is called:
(a) Operating system
(b) Computer
(c) Office
(d) Compiler
(e) Interpreter
Option a – Operating system
Every computer has a(n) ____; many also have:
(a) Operating system; a client system
(b) Operating system; instruction sets
(c) Application programs; an operating system
(d) Application programs; a client system
(e) Operating system; application programs
Option e – Operating system; application programs
An operating system that allows only one user to work on a computer at a time is known as:
(a) Single-user operating system
(b) Multi-user operating system
(c) Single-tasking operating system
(d) Multitasking operating system
(e) Real-time operating system
Option a – Single-user operating system
____ is a feature for scheduling and multi-programming to provide an economically interactive system of two or more users.
(a) Time-sharing
(b) Multi-sharing
(c) Time-tracing
(d) Multiprocessing
(e) None of these
Option a – Time-sharing
DOS (Disk Operating System) does not have:
(a) A boot record
(b) A file allocation table
(c) A root directory
(d) A virtual memory
(e) All of the above
Option e – All of the above
Which of the following is not a usual file extension in DOS?
(a) .exc
(b) .bat
(c) .0
(d) .com
(e) None of these
Option c – .0
Which DOS command sends the contents of the screen to an output device?
(a) Break
(b) Disk Copy
(c) More
(d) Assign
(e) None of these
Option b – Disk Copy
The DOS command that cannot be executed with versions 1 and 2 is:
(a) Graphics
(b) Find
(c) Label
(d) Mode
(e) None of these
Option c – Label
Which of the following is not an operating system?
(a) Windows
(b) DOS
(c) Linux
(d) Unix
(e) CP/M
Option e – CP/M
A command in DOS used to set a name to a disk is:
(a) VOL
(b) REN
(c) LABEL
(d) CLS
Option c – LABEL
Second generation computers were developed during:
A) 1949 to 1955
B) 1956 to 1965
C) 1965 to 1970
D) 1970 to 1990
Option b – 1956 to 1965
What do you call a single point on a computer screen?
A) Cell
B) Element
C) Pixel
D) Bit
Option c – Pixel
Mostly, which of the following devices is used to carry user files?
A) Floppy Disk
B) Hard Disk
C) RAM
D) CD-ROM
Option a – Floppy Disk
Who invented Mark I?
A) Howard Aikin
B) J. P. Eckert
C) John Mauchly
D) John V. Atanasoff
Option a – Howard Aikin
ALU stands for:
A) Arithmetic Logic Unit
B) Array Logic Unit
C) Application Logic Unit
D) None of the above
Option a – Arithmetic Logic Unit
A computer program that converts an entire program into machine language at one time is called a/an:
A) Interpreter
B) CPU
C) Compiler
D) Simulator
Option c – Compiler
When did arch rivals IBM and Apple Computers Inc. decide to join hands?
A) 1978
B) 1984
C) 1990
D) 1991
Option d – 1991
The purpose of a vacuum tube was NOT to act like:
A) An amplifier
B) A switch
C) A router
D) None of the above
Option c – A router
As compared to diskettes, the hard disks are:
A) More expensive
B) More portable
C) Less rigid
D) Slowly accessed
Option a – More expensive
Which of the following is the most quickly accessible storage?
A) RAM
B) Registers
C) Disks
D) Pen Drive
Option b – Registers
The octal equivalence of 111010 is:
A) 81
B) 72
C) 71
D) None of the above
Option b – 72
Excessive parallel processing is related to:
A) First generation
B) Fourth generation
C) Fifth generation
D) Third generation
Option c – Fifth generation
Which of the following is a secondary memory device?
A) Keyboard
B) Disk
C) ALU
D) All of the above
Option b – Disk
The memory which is programmed at the time it is manufactured:
A) ROM
B) RAM
C) PROM
D) EPROM
Option c – PROM
One of the popular mass storage devices is CD ROM. What does CD ROM stand for?
A) Compactable Read Only Memory
B) Compact Data Read Only Memory
C) Compactable Disk Read Only Memory
D) Compact Disk Read Only Memory
Option d – Compact Disk Read Only Memory
Identify the true statement:
A) Computers are 100% accurate but it can suffer from GIGO
B) Computers are reliable because they use electronic components which have a very low failure rate
C) Computers are never tired and do not suffer from boredom
D) All of the above
Option d – All of the above
FORTRAN stands for:
A) File Translation
B) Format Translation
C) Formula Translation
D) Floppy Translation
Option c – Formula Translation
The programs that are as permanent as hardware and stored in ROM are known as:
A) Hardware
B) Software
C) Firmware
D) ROM ware
Option c – Firmware
Which of the following memories must be refreshed many times per second?
A) Static RAM
B) Dynamic RAM
C) EPROM
D) ROM
Option b – Dynamic RAM
What do you call the translator which takes an assembly language program as input and produces machine language code as output?
A) Compiler
B) Interpreter
C) Debugger
D) Assembler
Option d – Assembler
Serial access memories are useful in applications where:
A) Data consists of numbers
B) Short access time is required
C) Each stored word is processed differently
D) Data naturally needs to flow in and out in serial form
Option d – Data naturally needs to flow in and out in serial form
In which mode is the communication channel used in both directions at the same time?
A) Full-duplex
B) Simplex
C) Half-duplex
D) None of the above
Option a – Full-duplex
Who invented Slide Rules?
A) John Napier
B) William Oughtred
C) Gottfried Leibnitz
D) Blaise Pascal
Option b – William Oughtred
The proper definition of a modern digital computer is:
A) An electronic automated machine that can solve problems involving words and numbers
B) A more sophisticated and modified electronic pocket calculator
C) Any machine that can perform mathematical operations
D) A machine that works on binary code
Option a – An electronic automated machine that can solve problems involving words and numbers
Memory is made up of:
A) Set of wires
B) Set of circuits
C) Large number of cells
D) All of these
Option c – Large number of cells
The qualitative or quantitative attribute of a variable or set of variables is termed as:
A) Data
B) Information
C) Both of the above
D) None of the above
Option a – Data
Main storage is also called:
A) Accumulator
B) Control Unit
C) Register Unit
D) Memory
Option d – Memory
Which of the following are considered to be Video Components?
A) Resolution
B) Color depth
C) Refresh rate
D) All of the above
Option d – All of the above
For what was Antikyathera used?
A) For counting
B) For calculating tax collection
C) For calculating astronomical positions
D) For calculating firing weapons
Option c – For calculating astronomical positions
Memory unit is one part of:
A) Input device
B) Control unit
C) Output device
D) Central Processing Unit
Option d – Central Processing Unit
Microprocessors can be used to make:
A) Computers
B) Digital systems
C) Calculators
D) All of the above
Option d – All of the above
Which statement is valid about computer programs?
A) High-level languages must be converted into machine language to execute
B) High-level language programs are more efficient and faster to execute
C) It is more difficult to identify errors in high-level language programs than in low-level programs
D) All of the above
Option a – High-level languages must be converted into machine language to execute
By programmable machine we mean:
A) Computers
B) Modern televisions
C) Washing machines
D) Anything that can be set to perform different tasks with suitable programs
Option d – Anything that can be set to perform different tasks with suitable programs
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